Lock washer



Nov. 11, 1941. c, s iyipsow 2,262,439

LOCK WASHER Filed Aug. 14, 1939 Inventor A itomeys to the-other as clearly shown in Figure 2.

Patented Nov. 11,

UNITED \STATE S- PATENT. OFFICE LOCK WASHER Dan Simpson, Corona, N. Mex.

Application August 14, 1939, Serial No. 290,06b

1 Claim.

companying drawing and specifically pointed out in the appended claim. q In describing the invention in detail, reference will be had to the accompanying drawing wherein like characters, denote likeor corresponding parts throughoutthe several views, and in which:

Figure'l is a plan view of the improved device.

Figure 2 is an edge view thereof looking toward the slotted part.

Figure 3 is a fragmentary plan view "looking toward one end of the device.

Figure 4 is a similar-view looking other end of thedevice.

The washer-isr-sho at A and is formed with a substaxitiallii-shied toward the des the overlapping end portion 2. As shown the end portions of the slot incline outwardly in opposite directions from the circumferentiallly extending part of the slot and this circumferentially extending part slightly slopes from one end The inner face of .each overlapping part 2 is formed with a groove 3 which gradually increases in depth from its outer end to its inner end, the inner end being arranged substantially at the center of the overlapping-part 2 and these moves receive a spherical member I which facilitates nut is firmly held against movement on the bolt.

In order to weaken that part of the washer which is opposite the slotted part a notch or hole 6 is formed in said partwhich passes through the outer circumference of the washer as shown in Figure 1 and the exterior circumference of the washer is beveled from its center to its side edges as shown at I, this facilitating the placing of a wrench over the washer and nut, this wrench acting to prevent the washer from spreading and thus the nut and washer can be readily removedby the wrench.

If desired a ball may be placed in the hole 6 to check the spreading action of the washer.

As will be seen when the nut is tightened against the washer and the washer against the work piece the ball 4 will tend to press the overlapping ends away from each other to cause the parts 5 to bite more firmly into the parts.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

slot 1 therein which makes the washer of split construction and pro- It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that such changes 'fall within the scope of the appended claim. a

Having described the invention, what is claimed as new is:

Awasher of the class described comprising a ring-shaped body having a Z-shaped slit therein providing overlapping ends, the central portion of the slit extending circumferentially of the body butsloping slightly from one end'to the other and with each end portion of the slit extending at a slight slope to the axis of the body and ina direction to make the extremity of an overlapping end slope outwardly from its inner corner to its outer corner, to provide a biting 40 edge at the outer corner, the inner faces of said movement of one end part I relative to the other. The sloping end portions of the slot provide a beveled end for each overlapping part and each beveled end forms aj biting wedge 5, these portions 5 biting into the metal of the work piece and. of the I nut when the washer expands or spreads. Thusv the washer prevents relative movement of the nut and'work piece so that the overlapping ends having grooves therein, each groove extending from an intermediate part of anoverlapping end to its extremity with each groove gradually increasing. in depth from its outer end to its inner end and a spherical member located between the two overlapping ends and having portions seated in the grooves.

DAN c. SIMPSON. 

